Those mods are not 'official Elecraft', but will help in reducing the
bass response of the KSB2. That is a good thing with any microphone
because the low frequency response just wastes power and does not add
much to communications quality.
It is applicable for any microphone, not just the Heil.
73,
Don W3FPR
On 2/10/2015 12:57 AM, Phil Wheeler wrote:
Good question. I've never had any issues with my audio reports, using
the Elecraft MH2 mic; in fact all audio reports have been positive. It
sounds like these mods are for the Proset K2 Heil mic/headset (I'm not
sure which Heil mic element is in this model).
There were some K2 mods related to the SSB bandwidth, but these were
not so much "audio", if I understand the question -- though they would
impact the audio.
73, Phil W7OX
On 2/9/15 8:33 PM, Brian Denley wrote:
George et al:
Did Elecraft ever adopt these (or any other) K2 SSB audio changes?
Brian
KB1VBF
Sent from my iPad
On Feb 9, 2015, at 10:32 PM, George Winship, NC5G
<gwwa5...@hotmail.com> wrote:
Thanks for posting this, Ray. I also was getting those kind of
reports on my
K2. I was able to get the 1uF electrolytics but was unable to find the
0.1uF. G3RXQ was quick to respond to my email and said that a 0.1uF
monolithic could be used instead. The results are great, as
confirmed by
hams I talk to on a regular basis for many years.
Now, if I could only get the circuit between my ears to work so that
I could
tell that I had not put my K2 in split mode while trying to work K1N a
little while ago, all would be good. The "frequency police" were not
bashful
in letting me know the error of my ways.
Thanks again.
73,
George NC5G
Other K2 owners may be interested in this.
After getting many reports of poor quality transmit audio with my
K2 (using
the Proset K2 Heil boom >microphone and headset), I carried out the
modifications described by G3RXQ which increase the lower cut >off
frequency
of the microphone circuit on the KSB2. This involves changing C34 from
2.2uF to 1uF, C31 >from 2.2uF to 1uF and C20 from 0.33uF to 0.1uF.
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